GeoNotes Blog

Notes for myself and others

  • Sample blog post to learn markdown tips

    There's lots to learn!

    By Bill Smith

    Posted on February 28, 2020

    This is a demo post to show you how to write blog posts with markdown. I strongly encourage you to take 5 minutes to learn how to write in markdown - it’ll teach you how to transform regular text into bold/italics/tables/etc.I also encourage you to look at the code that... [Read More]
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  • Photo contact sheet from command line

     By John C. Zastrow

    Posted on August 7, 2015

    Recently I needed to inventory a bunch of equipment at a client so I went armed with camera and took a bunch of pictures and notes and came home. Ultimately what I wanted was one or more files containing thumbnails of each image along with the filename below it to... [Read More]

  • ArcMap 10.2 slowness

     By John C. Zastrow

    Posted on March 6, 2014

    We’ve been experiencing some a lot of slowness with ArcMap 10.2 across many Windows 7 (64-bit of course) Pro and Enterprise machines. So my colleague has done a lot of research, phone calling (with Esri), and troubleshooting to arrive at the following helpful information. If you having some weird and... [Read More]

  • Dear hipsters

     By John C. Zastrow

    Posted on February 22, 2014

    Just wearing untucked plaid shirts, that you clearly paid too much for, does not make you cool.

  • Postgres database from itis.gov

     By John C. Zastrow

    Posted on January 29, 2014

    This might save you some head aches. The postgresql database dump of the taxonomic universe (according to the USGS) from http://www.itis.gov/ is provided in a latin1 character encoding (specifically it tries to create a database as ENCODING = 'LATIN1' LC_COLLATE = 'en_US.ISO8859-1' LC_CTYPE = 'en_US.ISO8859-1'. [Read More]

  • PostgreSQL/PostGIS and ArcGIS ArcMap 10.2

     By John C. Zastrow

    Posted on August 22, 2013

    Of course good things come to those who wait (at least that’s the wisdom that I pass along to my kids). We expect that after we’re done waiting we will get something awesome and worth the wait, right? But sometimes what we end up getting is a little underwhelming and... [Read More]

  • I Love LIDAR

     By John C. Zastrow

    Posted on April 12, 2013

    Over the years I’ve tasted good bear, coffee, and hot cocoa. Now I have a hard time drinking the cheap stuff– though I try not to drink expensive wine for fear of losing my wallet. I’m about to get another expensive taste: LIDAR data. I’ve never worked with it before,... [Read More]

  • Spatialite wishlist for 2013

     By John C. Zastrow

    Posted on April 1, 2013

    The Spatialite project and its family of products is progressing and gaining a larger following by the day. Growth seems to be coming from its apparent target audience – mobile developers (though I rely on it for desktop use). This is likely to only snowball as Spatialite acceptance increases and... [Read More]

  • Find listen ports on your linux

     By John C. Zastrow

    Posted on March 22, 2013

    For example, if you only want to see TCP connections, use netstat –tcp. This shows a list of TCP connections to and from your machine. The following example shows connections to our machine on ports 993 (imaps), 143 (imap), 110 (pop3), 25 (smtp), and 22 (ssh).It also shows a connection... [Read More]